Are you saying it cranks good but won't start? If so, have a helper crank it, while you visually check for spark at the plugs. If spark everywhere, use a gage and check fuel pressure. Let us know the fuel pressure spec. Are there any applicable trouble codes?
To check for spark, pull plug boot, use known good plug or spark tester in the boot, ground metal part of plug/tester to metal part of engine, watch for spark, engine cranking.